Lexmark C510 Guide D'installation page 35

Loading the trays
Note:
The length and width guides in an optional
530-sheet tray are shaped differently than the guides in
the standard tray, but the function is the same.
Follow these instructions to load paper in
the standard and optional trays.
1
2
Load paper
29
Pull the tray completely out.
If you are loading an optional legal
tray, open the cover.